这个区域称为稀疏区,并用疏散的小点表示。
This is called a rarefaction and is represented by widely spaced dots.
再把密集区分为新的人口稀疏区和密集区,此过程反复直至求出接近于人口真实分布的人口模型。
The more densely populated region is then again subdivided into sparsely and densely populated regions until the real population distribution is obtained.
在城市的这一地区,房屋坐落稀疏。
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